package br.unifesp.lma.chamada.config;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements Filter {

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {

		HttpServletRequest httpRequest = (HttpServletRequest) request;
		HttpSession session = httpRequest.getSession(false);
		if (session == null || session.getAttribute("professorId") == null) {
			HttpServletResponse httpResponse = (HttpServletResponse) response;
			httpResponse.sendRedirect("/?url=" + httpRequest.getRequestURL());
		}
		filterChain.doFilter(request, response);
	}

	@Override
	public void destroy() {
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}

}
